Hobby Electronics Basics

  1. Home
  2. Hobby Electronics Basics
9387 Threads Posts
to

Worth reading in Hobby Electronics Basics

LED pulse stretcher

Hello, can anyone please point me to a circuit that I can use to stretch the on time of an LED when the on pulse is sma...
5 comments posted 18yrs
posted by gary_windsor
5 comments posted 18yrs posted by gary_windsor

Relaxation Oscillator - Understanding OpAmps

Hello, I'm trying to construct and understand the Relaxation Oscillator circuit in the Art of Electronics. The circuit...
1 comments posted 18yrs
posted by mhs000
1 comments posted 18yrs posted by mhs000

Replacing Electret Microphone With Audio Input?

I am looking at a number of FM transmitter circuits, purely as a project, but all of them use electret microphones as in...
27 comments posted 18yrs
posted by the1930s
27 comments posted 18yrs posted by the1930s

Wattage Rating Of Pots Used In Volume Control

I want to build I volume control for a battery powered amplifier I use for my iPod, but I'm not sure what wattage value...
12 comments posted 18yrs
posted by the1930s
12 comments posted 18yrs posted by the1930s

Help needed with basic transistor assumptions

Hi, I'm a high school teacher and I've been working on a transistor revision sheet for my students. I'd appreciate any...
7 comments posted 18yrs
posted by rgdavidson
7 comments posted 18yrs posted by rgdavidson

Tesla coil parts - where to salvage?

Hi, I'm trying to put together a Tesla coil following plans for a vacuum tube based design. I need to find the followin...
3 comments posted 18yrs
posted by kasterborus
3 comments posted 18yrs posted by kasterborus

mmIO in software

Hi, I have the XC164CM Easy Kit from Infineon. Is it possible to trigger an interrupt, if a certain memory page is acce...
0 comments posted 18yrs
posted by thorstenkiefer
0 comments posted 18yrs posted by thorstenkiefer

design and parts ?

I want to build the killer of all dog bark stoppers. (Sorry to any dog lovers but we have neighbors with two dogs that...
5 comments posted 18yrs
posted by james
5 comments posted 18yrs posted by james

NEED Help From Basic Ohm's Law to E=SqRt of P*R

Basic Ohm's Law E P ---------------- ---------------- I R E I What simple Ohm's Law formulas get combined to (Exp.E=RxI...
2 comments posted 18yrs
posted by rdeleccon
2 comments posted 18yrs posted by rdeleccon

Optoisolator question

Hi! A simple question. I want to use the TLP280 photocoupler. What is the spec that tell me the maximum voltage I can pu...
2 comments posted 18yrs
posted by reginald.louis
2 comments posted 18yrs posted by reginald.louis

Simple MotorCycle Monitor

That would monitor the battery and LED be green till the battery went below, let's say 9-10V?, then red. The smaller th...
3 comments posted 18yrs
posted by pinkFloyd43
3 comments posted 18yrs posted by pinkFloyd43

Charging A Lead Acid Battery

How would I go about building a charger for a lead acid battery. Jaycar Electronics sells a 5 amp hour 6 volt SLA batte...
25 comments posted 18yrs
posted by the1930s
25 comments posted 18yrs posted by the1930s

9's Complement BCD Thumbwheel Switches

I'm helping a guy with a microcontroller project. He's going to use some BCD thumbwheels to set a time delay. He purcha...
5 comments posted 18yrs
posted by abuse
5 comments posted 18yrs posted by abuse